A stone is thrown with an initial upward velocity of 7.0 m/s and experiences negligible air resistance.If we take upward as the positive direction,what is the velocity of the stone after 0.50 s?
A)2.1 m/s
B)4.9 m/s
C)-2.1 m/s
D)-4.9 m/s
E)0.00 m/s

Question

Quizplus · Accepted Answer

Using the kinematic equation v = u + at, where u is the initial velocity, a is the acceleration due to gravity (-9.8 m/s^2), t is time, and v is final velocity, we get:
v = u + at
v = 7.0 m/s - 9.8 m/s^2 * 0.50 s
v = 7.0 m/s - 4.9 m/s
v = 2.1 m/s (upward)
Therefore, the answer is A.

A Stone Is Thrown with an Initial Upward Velocity of 7.0